深部缓倾斜煤层护巷煤柱合理宽度研究

Research on Reasonable Width of Gateway Protecting Coal Pillar in Deep Gently Inclined Coal Seam

根据深部缓倾斜煤层沿空掘巷地质条件,利用理论分析获得了缓倾斜煤层应力降低区宽度与塑性区宽度的计算表达式。为了优化设计深部缓倾斜煤层护巷煤柱宽度,利用数值模拟分析了不同护巷煤柱宽度条件下的应力场、位移场、塑性区的分布特征。评价了不同煤柱宽度的巷道稳定性。确定了缓倾斜煤层护巷煤柱合理宽度为5 m。

According to geological conditions of specific production in deep gently inclined coal seam, the expression of stress reduction area width and plastic zone width in gently inclined coal seam by theoretical analysis. In order to optimize the width of gateway protecting coal pillar in deep gently inclined coal seam. The distribution characteristics of stress field ,displacement field and plasticity zone under different width of gateway protecting coal pillar was analyzed by numerical simulation. The stability of roadway was evaluated. The reasonable width of gateway protecting coal pillar is 5 m.